Which of the Following Correctly Labels the Salts? HF (K_{a $\times$}

Multiple Choice

Which of the following correctly labels the salts? HF (K_a = 7.2 $\times$ 10^-4)
NH₃ (K_b = 1.8 $\times$ 10^-5)
HCN (K_a = 6.2 $\times$ 10^-10)

A) NaCN = acidic,NH₄F = basic,KCN = neutral
B) NaCN = acidic,NH₄F = neutral,KCN = basic
C) NaCN = basic,NH₄F = basic,KCN= neutral
D) NaCN = basic,NH₄F = neutral,KCN = basic
E) NaCN = basic,NH₄F = acidic,KCN = basic